JLab Experiment 91-011

Investigation of the N to Delta Transition via Polarization Observables in Hall A

• J. J. Kelly et al., Recoil Polarization for Delta Excitation in Pion Electroproduction, Phys. Rev. Lett. 95, 102001 (2005)

• J. J. Kelly, Accuracy of traditional Legendre estimators of quadrupole ratios for the N→Δ transition, Phys. Rev. C 72, 048201 (2005)

• J. J. Kelly et al., Recoil polarization measurements for neutral pion electroproduction at Q²=1 (GeV/c)² near the Δ resonance, Phys. Rev. C 75, 025201 (2007); also see epaps supplement

Analysis reports

Dates are given for the last revision.  Most files are in g-zipped postscript format.  Some drafts are password protected.

• BCM calibration (08/31/2000)
• M. Jones, Electronic deadtime (09/11/2000)
• R. E. Roché, Luminosity measurements (11/14/2000)
• R. E. Roché, Spectrometer offsets (02/06/2001)
• R. E. Roché, Beta optimization and header files (05/28/2001)
• R. E. Roché, False asymmetry (01/30/2002)
• R. E. Roché, Scintillator efficiencies (05/02/2002)
• R. Michaels and M. Jones, Electronic deadtime in Hall A (07/29/2003)
• J. J. Kelly and O. Gayou, Pseudodata analysis of acceptance averaging (revised 8/5/2005)
• J. J. Kelly, Legendre fit to response functions (revised 7/18/2005)
• J. J. Kelly, Multipole analysis (revised 7/18/2005)
• J. J. Kelly and O. Gayou, Systematic errors (04/08/2005)
• J. J. Kelly, Accuracy of traditional Legendre estimators of quadrupole ratios for the N->Delta transition (07/06/2005)
• J. J. Kelly, Comparison between Legendre quadrupole estimators for e91011 and Joo et al. (08/16/2005)

Files are provided in Mathematica notebook (nb), pdf, or postscript (ps) format, as indicated.

• J. J. Kelly, Recoil-Polarization Response Functions for Electroproduction of Pseudoscalar Mesons,  nb pdf

• J. J. Kelly, Target-Polarization Response Functions for Electroproduction of Pseudoscalar Mesons,  nb pdf

• J. J. Kelly, Relativistic Spin Rotation,  nb pdf

  • Comment on "Wigner-Thomas precession in polarized coincidence electronuclear scattering", ps

• J. J. Kelly, Recoil Polarization Bases,  nb pdf

• J. J. Kelly, Truncation errors in Legendre Analysis of N->Delta quadrupole ratios, nb pdf

Most files are in g-zipped postscript format.

• 2000

• 2001

• 2002

• 2003

• 2004

• Z. W. Chai, Study of the N to Delta Transition via p(e,e'p)pi0 Reaction, MIT, September 2003.  pdf

• R. E. Roché, Measurement of Polarization Observables in the  Electro-Excitation of the Proton to its First Excited State, Florida State University, June 2003.  pdf

• S. Escoffier, Mesure precise de la polarisation du faisceau d'electrons a TJNAF par polarimetrie Compton pour les
  expériences Gep et N-Delta, University of Paris, October 2001.   pdf 

• J. J. Kelly, Status of Hall A Resonance Program, (JLab User's Workshop and Annual Meeting, June 2005)

• J. J. Kelly, Response functions for Delta Excitation at Q² = 1 (GeV/c)², (JLab seminar, May 11, 2005)

• J. J. Kelly, Response functions for Delta Excitation, (Gordon Photonuclear Conference, 2004)

• R. E. Roché, Polarization Observables in the p(e,e'p)pi0 Reaction, EEP03 (Grenoble, 2003)

• R. E. Roché, Polarization Observables in the p(e,e'p)pi0 Reaction, EuroConference on Hadron Structure (Santorini, 2003)

• A.J. Sarty, Recoil Polarization Measurements in pi0 Electroproduction near the Delta(1232), Perspectives in Nuclear Physics (Trieste, 2003)

• J. J. Kelly, Recoil Polarization for Neutral Pion Electroproduction near the Delta Resonance, conference on Nuclear and Particle Physics with CEBAF (Dubrovnik, 2003)

• S. Frullani, Polarization Observables in N-Delta Transition, NATO Advanced Spin Workshop (Yerevan, 2002)

• A.J. Sarty, Recoil Polarization Measurements in pi0 Electroproduction at the Peak of the Delta(1232), NSTAR2001 (Mainz, 2001)

The results shown in conference proceedings should be considered preliminary and should not be used or reproduced without permission of the spokespersons!

• S. Frullani, Polarization Observables in the N->Delta(1232) Transition, Proceedings of the Nato Advanced Research Workshop on Spin Structure of the Nucleon (Kluwer Academic Publishers, Dordrecht, 2003), pp.221-234

• R. E. Roché, Polarization Observables in the p(e,e'p)pi0 Reaction, EEP03 (Grenoble, 2003)

• J. J. Kelly, Recoil Polarization for Neutral Pion Electroproduction near the Delta Resonance, Proceedings of the Conference on Nuclear and Particle Physics with CEBAF (Dubrovnik, 2003); published as Fizika B 13, 81 (2004)

• J. J. Kelly et al., Recoil Polarization for Delta Excitation in Pion Electroproduction, arXiv:nucl-ex/0505024

• J. J. Kelly, Accuracy of traditional Legendre estimators of quadrupole ratios for the N→Δ transition, arXiv:nucl-ex/0507010

• J. J. Kelly et al., Recoil Polarization Measurements for Neutral Pion Electroproduction at Q²=1 (GeV/c)² Near the Delta Resonance, arXiv:nucl-ex/0509004.  This is a longer version of the article eventually published in Phys. Rev. C.

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Maintained by: James J. Kelly
Last revised: February 12, 2007